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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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//! Skiplist memtable factory

use std::sync::{atomic::AtomicU64, Arc};

use arena::MonoIncArena;
use skiplist::{BytewiseComparator, Skiplist};

use crate::memtable::{
    factory::{Factory, Options},
    skiplist::SkiplistMemTable,
    MemTableRef, Result,
};

/// Factory to create memtable
#[derive(Debug)]
pub struct SkiplistMemTableFactory;

impl Factory for SkiplistMemTableFactory {
    fn create_memtable(&self, opts: Options) -> Result<MemTableRef> {
        let arena = MonoIncArena::with_collector(opts.arena_block_size as usize, opts.collector);
        let skiplist = Skiplist::with_arena(BytewiseComparator, arena);
        let memtable = Arc::new(SkiplistMemTable::new(
            opts.schema,
            skiplist,
            AtomicU64::new(opts.creation_sequence),
        ));

        Ok(memtable)
    }
}
